Electrical Engineering : Dc Generators QUESTIONS AND ANSWERS :: part2 : 6 to 10
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.The voltage drop for which of the following types of brush can be expected to be least ? |
Graphite brushes |
Carbon brushes |
Metal graphite brushes |
None of the above |
7.For a D.C. machines laboratory following type of D.C. supply will be suitable |
rotary converter |
mercury are rectifier |
induction motor D.C. generator set |
synchronous motor D.C. generator set |
8.The number of brushes in a commutator depends on |
speed of armature |
type of winding |
voltage |
amount of current to be collected |
9.Which of the following statement about D.C. generators is false ? |
Compensating winding in a D.C. machine helps in commutation |
In a D. C. generator interpoles winding is connected in series with the armature winding |
Back pitch and front pitch are both odd and approximately equal to the pole pitch |
Equilizing bus bars are used with parallel running of D.C. shunt generators |
10.The demagnetising component of armature reaction in a D.C. generator |
reduces generator e.m.f. |
increases armature speed |
reduces interpoles flux density |
results in sparking trouble |
More Dc Generators QUESTIONS AND ANSWERS available in next pages
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